Antiskid device



O. S. PULLIAM.

ANTISKID DEVICE.

PPLICATION FILED JULY 2, m9.

Patented Sept. 20,1921;

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ATTORNEYS IIV I/EIVT @577 2g? l I 0. S. PULLIAM.

ANTISKID DEVICE. APPLICAIION HLED JULY 12, 1919.

Patented Sept. 20, 1921.

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A TTORNEYS UNITED STATES P TE T OFFICE,-

OSWALD s. PULLIAM, or NEW Yomgn'Y.

ANTISKID DEVICE.

Application filed July 12,

To all whom it may concern:

Be it known that I, OSWALD S. PULLIAM,

a citizenof the United States, and a resiwith the tire or traction surface of the wheel.

Another object of the invention is to pro vide means by which the traction increasing'elements are locked against movement in both their operative and inoperative positions. i I

A further object of the invention is provide a device of this character which is capable for use in connection with pneumatic tires without in any manner injuring the tires.

With the above and other objects in view,

reference is had to the accompanying drawings in which Figure 1 is a fragmentary side elevation of an automobile wheel equipped with a device constructed in accordance with the present invention;

Fig. 2 is a vertical sectional view takenon the line 22 of Fig. 1;

Fig. 3 is a detail sectional view taken on the line 3-3 of Fig. 1;

Fig. 4 is a fragmentary side elevation of awheel equipped with a device constructed in accordance with a modified form of the invention;

Fig. 5 is a sectional view on the line 5-5 of Fig. 4, showing the traction increasing members in their operative position, and

Fig. 6 is a similar viewshowing the traction increasing members in their inoperative position.

Referring more particularly to the drawings, the reference numeral 10 designates a wheel, and 11 designates a channel or rim carried thereby, said channel serving for securing the casing 12, together with its tube -13, in. place on the wheel. The channel 11 is pr ided n its pp s e ide with p 1- Speciflcation of Letters Patent. Patented Sept. 20, 1921 1919. Serial No. a1o,324. g 9

rality of spaced lugs 14, and bridging each palr of lugs 14, is a rigidishaft or pintle 15, said pintle being provided with a suitable slot or opening 16, which passes-diametrically therethrough. I a

The reference character 17 designates the anti-skid elements. vEach ofv said elements comprises a resilient steel "strip, as best showninFig. 1, said strip being so constructed that its outer free portion conforms to the shape of the casing'12. As shown in Fig. 3, this anti-skid element is provided with a bearing 19 on its inner end, and said bearing 1s adapted to receive the "shaft or pintle 15 to serve the means for pivotally mounting said anti-skid element 17 to the channel 11 of the wheel 10.

Carried'by each of the bearing members 19 is a sliding bolt 20, saidbolt being pro-'- vided with a washer 21. The bolts 20 are each slidab1y-mounted in a bearing 22,

which is threaded, as at 23', into thebearing 19, and interposed between said bearing22 and the washer 21, 'is'a coil spring 24, by means of which the freeendof the bolt is maintained in engagement with the opening 16 of the shaft or pintle 15. Each of these sliding bolts 20 is provided with an operating knob 25, by means of which it is reciprocated in the bearing member 22. By this construction, it will be seen that when the anti-skid elements 17 are engaged with the tire casing 12, as shown in Fig. 2, the sliding bolts 20 are adapted to engage the outer side of the slots or openings 16 to maintain the anti-skid elements in the position shown in said figure.

As shown at X in Fig. 1, the anti-skid elements are adapted to fold inwardly out of engagement with the tire and lie between the spokes of the wheel, and when in this position, the sliding bolts 20 are adapted to engage the inner end of the slots ,or openings 16 to maintain the anti-skid elements in their inoperative position.

In the form of the invention shown in Figs. 4 to 6, inclusive, the anti-skid elements comprise flexible sheet metal members 30, which are areuate and are adapted to conform in shape to the tread portion of the casing 12. Pivotally secured to each end of the anti-skid elements 30 are links 31 and 32. The link 31 is pivotally secured to the channel member 11, by means of lugs 33, and a pintle 34, said link being pivotally connected to the anti-skid el ments .3 y

means of a pintle or the. like 35. The opposite side of the channel member 11 is provided at a point opposite the lugs 33, with a projecting lug 36, and said projecting lug 36 is provided with an inner curved seat 37 and an outer curved seat.38,vthe purpose of which will be hereinafter described; The link 32 is pivotally secured as at 39, to the anti-skid elements 30, and mounted in the freeend ofsaidlink 32 is. a cam member 40.

Th link 32 is furtherprovided with an opening 41, which is adapted to receive the lug '36 in a. manner to be herelnafter set forth. t i w r In this form of the invention, when the anti-skid elements are desired for use, the same are positioned about the treadfof the tire as shown in 'Fig. 5, The cam member 40 engages-the inner curved side 37 'of the lu 36, thus serving to maintain the antiskid elements 30, in-engagementfwith the tire. When,;however, it is desired to remove the anti-skid elements 30 from their operative position, as shown in Fig. '6, the anti-skid elements 30 are engaged Wltllthe inner face of the Wheel 10, and the cam member 40 is engaged with the outer'curved seat 38 of the lugf36, in order to tighten the lugs 31 and 32 and the anti-skid elements against: the rim of the tire. In order to prevent rattlin 'of the parts-when in this position, suita le strips 41" of rubber or the like, are interposed between the links 31 and 32 and the wheel 10. V

7 From the foregoing, it will be apparent that the present invention provides antiskid devices for pneumatic tires which are at all times carried by the wheel, and which are capable of being secured in both their operative andinoperative positions.

Having thus described the invention, what is claimed is:

1. A device of position transverse the-tread of the wheel and anzinoperative position within the conthe character describedcomprismg 1n combination, a wheel, a mm,

fines ofthe wheel, a bolt formingthe pivotal support for each of said anti-skid Telement's,-sa1d bolt having an opening extending therethrough, and means carried by each of said anti-skid elements anda'dapted to be received in one endlof theopeninginits respective bolt to secure the anti-s-kidwele'ment in oneiposition-and engage the opposite end of said opening to loclrtlie anti-skid element in the inoperative position, I V

OSWALD is. PULLIAM. 

